regexp-search added, std lib loader changes, more REadme items

ml_string.cpp

@@ -12,3 +12,21 @@ void replace_substring(std::string &src, const std::string &substr, const std::s
 	}
 }
 
+
+// Returns true if where contains regex
+bool regexp_search(const std::string &where, const std::string &regex_str) {
+	// online tester https://www.regextester.com/97722
+	std::regex regex(regex_str);
+	std::smatch match;
+
+	if(std::regex_search(where, match, regex)) {
+		// std::cout << "matches for '" << where << "'\n";
+		// std::cout << "Prefix: '" << match.prefix() << "'\n";
+		// for (size_t i = 0; i < match.size(); ++i)
+		// 	std::cout << i << ": " << match[i] << '\n';
+		// std::cout << "Suffix: '" << match.suffix() << "\'\n\n";
+
+		return true;
+	}
+	return false;
+}